Reverse Data Rate Control via Multi-Step Transition in Mobile Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing Limited Rate Transition scheme in mobile communication systems restricts data rate transitions to one step, leading to prolonged time for mobile stations to reach high data rates, resulting in reduced reverse data throughput and inefficient resource allocation.
Innovation Solution
The proposed method introduces a new data rate control mechanism that allows mobile stations to increase their data rate by at least two steps, using a forward scheduling channel (F-SCH) to transmit scheduled data rate information and identifier information, enabling rapid data rate adjustments and efficient resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the Limited Rate Transition scheme is used to control data rate, then the interference to other cells is reduced and overhead is minimized, but the time required for mobile stations to reach high data rates is prolonged
Solution Approach 1:
The patent introduces a dynamic rate transition mechanism that adapts the step size based on system conditions. The base station can dynamically adjust whether to allow one-step or multi-step rate transitions by setting the MS_RATE_TRANSITION bit in the scheduling assignment, enabling the system to switch between conservative (one-step) and aggressive (multi-step) rate transition modes depending on interference conditions and throughput requirements.
Solution Approach 2:
The patent changes the parameter of rate transition step size from fixed (one-step) to variable (one-step or multi-step). By modifying the MS_RATE_TRANSITION parameter in the scheduling assignment message, the base station controls whether the mobile station should transition its data rate by one step or multiple steps, thereby optimizing both interference control and throughput efficiency.
2Device complexity
If the Limited Rate Transition scheme is used, then overhead is minimized with single bit scheduling result, but resource allocation efficiency is reduced
Solution Approach 1:
The patent merges the rate transition control with the existing scheduling assignment mechanism. The MS_RATE_TRANSITION bit is integrated into the uplink scheduling assignment message that already contains resource allocation information, thereby controlling rate transitions without requiring separate control channels or additional overhead beyond what is already used for scheduling.
Solution Approach 2:
The patent applies partial rate transition control by using a single bit to indicate whether multi-step transition is allowed. When the MS_RATE_TRANSITION bit is set to '1', the mobile station can perform multi-step rate transition; when set to '0', it performs one-step transition. This partial control mechanism provides flexibility in resource allocation efficiency while maintaining minimal overhead.
3Productivity
If multi-step data rate transition is allowed, then throughput is improved and time to reach high data rates is reduced, but control complexity increases
Solution Approach 1:
The patent enables the mobile station to autonomously determine its next data rate based on the MS_RATE_TRANSITION bit received from the base station. When the bit indicates multi-step transition is allowed, the mobile station independently calculates and applies the appropriate rate increase based on its buffer status and channel conditions, without requiring complex base station calculations or additional control signaling.
4Stability of the object's composition
If one-step rate transition is enforced, then system stability is maintained, but reverse data throughput is reduced
Solution Approach 1:
The patent introduces dynamic adaptability to the rate transition process by allowing the base station to switch between one-step and multi-step transition modes based on real-time system conditions. This dynamic control enables the system to maintain stability when needed (one-step mode) while achieving higher throughput when conditions permit (multi-step mode), resolving the contradiction between stability and productivity.
Data Source
AI summary
A system and method for controlling data rates of a reverse packet data in mobile communication system for transmitting reverse packet data from a mobile station to a base station over a reverse packet data channel at a plurality of data rates. The present invention provides an apparatus and method for improving throughput of an entire system by enabling a base station's scheduler to rapidly assign reverse resource for a mobile station that has completed its data transmission to other mobile stations.